/*
 * Indiana University Community Grid Computing Lab Software License,Version 1.1
 *
 * Copyright (c) 2002-2006 Community Grid Computing Lab, Indiana University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *      "This product includes software developed by the Indiana University
 *       Community Grid Computing Lab (http://www.communitygrids.iu.edu/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Indiana Univeristy","Indiana Univeristy Pervasive Techonology
 *    Labs" and  "Indiana Univeristy Community Grid Computing Lab" must not be
 *    used to endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    http://www.communitygrids.iu.edu/.
 *
 * 5. Products derived from this software may not use "Indiana
 *    University" name nor may "Indiana University" appear in their name,
 *    without prior written permission of the Indiana University.
 *
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * INDIANA UNIVERSITY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package cgl.narada.mgmt.common;

import java.util.StringTokenizer;

/**
 * <br>
 * Created on May 15, 2006<br>
 *
 * @author Harshawardhan Gadgil (hgadgil@grids.ucs.indiana.edu)
 */

public class NodeAddressConvertor {

   /**
    * Converts a string representation of address to an array of ints <br>
    * E.g. Convert 1,5,2,18 to {1, 5, 2, 18}
    *
    * @param address
    * @return
    */
   public static int[] toIntArray(String address) {
      StringTokenizer st = new StringTokenizer(address, ",");
      int[] addrArray = new int[st.countTokens()];

      for (int i = 0; i < addrArray.length; i++) {
         addrArray[i] = Integer.parseInt(st.nextToken());
      }
      return addrArray;
   }

   /**
    * Converts an array representation of address to a string <br>
    * E.g. Convert {1, 5, 2, 18} to 1,5,2,18
    *
    * @param address
    * @return
    */
   public static String toString(int[] address) {

      String s = "";
      int i = 0;
      for (; i < address.length - 1; i++) {
         s += Integer.toHexString(address[i]) + ",";
      }

      s += address[i];
      return s;
   }

   public static int findConnectionLevel(String from, String to) {

      int[] fromNABytes = NodeAddressConvertor.toIntArray(from);
      int[] toNABytes = NodeAddressConvertor.toIntArray(to);

      for (int i = 0; i < fromNABytes.length; i++) {
         if (fromNABytes[i] != toNABytes[i]) { return fromNABytes.length - i
                  - 1; }
      }

      return 0;
   }

   // public static void main(String[] args) {
   // // int[] x = toIntArray("1,4,32,18");
   // //
   // // for (int i = 0; i < x.length; i++) {
   // // System.out.println("x[" + i + "]:= " + x[i]);
   // // }
   // //
   // // System.out.println("Back to String: >" + toString(x) + "<");
   //
   // String x = "1,1,1,4";
   // String y = "1,1,1,8";
   //
   // System.out.println("Connection Level: " + findConnectionLevel(x, y));
   //
   // x = "1,1,2,1";
   // y = "1,1,4,8";
   //
   // System.out.println("Connection Level: " + findConnectionLevel(x, y));
   // }

}
